Does IE have anything similar to what -moz-border-radius does in firefox/chrome?
Also is the -moz-border-radius supported by safari?
Does IE have anything similar to what -moz-border-radius does in firefox/chrome?
Also is the -moz-border-radius supported by safari?
IE doesn't support the border radius CSS3 or custom implementations. Your best bet is to use something like jQuery and a rounded corners plug in (see below) to accomplish it.
http://plugins.jquery.com/project/corners
Here's a 2nd plug in that I use more often than the above:
http://www.methvin.com/jquery/jq-corner-demo.html
EDIT: As for safari, yes it has a custom implementation like mozilla.
-moz-border-radius: 5px; /* mozilla */
-webkit-border-radius: 5px; /* safari */
I tried corners last week, and it was broken in a number of browsers, most notably IE8. I'd avoid if possible.
You should design your design so that it looks and works ok in IE, and if opened in one of the newer browsers little things like rounded corners would just make your site look that much better. Things like that will eventually cause users to move to newer browsers, when the experience is better in one and not the other.